Diffuser



FIG. 1 is a perspective front view of the diffuser

FIG. 2 is a left side view of the diffuser

FIG. 3 is a front view of the diffuser

FIG. 4 is a back view of the diffuser

FIG. 5 is top view of the diffuser; and,

FIG. 6 is a perspective rear view of the diffuser

The dot-dot stippled lines depict surface shading.

CLAIM The ornamental design for a diffuser, as shown and described.